Outboard-motor for boats



H. W. SPENCER.

OUTBOARD MOTOR FOR BOAYS.

APPLICATION FILED JULY 19, 1920. 183,495o Patented July 5, 1921.v 2snails-SHEET 1 m 5; mm.

INVENTUR.

H. W. SPENCER.

OUTBOARD MOTOR FOR BOATS.

APPLICATION FILED JULY 19, 1920.

Patented July 5, 1921.

2 SHEETS-SHEET 2.

n 111 ilIII-iul iNVENTDR.

UNIT-ED STATES PATENT OFFICE.

HARRY W. SPENCER, F TORONTO, ONTARIO, CANADA;

Application filed July 1:),

To all whom it may concern Be it known that I, HARRY W. SPENCER,

of the city of Toronto, in the county of York, Province of Ontario,Canada, have invented certain new and useful Improvements inOutboard-Motors for Boats, of which the following is a specification.

This invention relates to motors particularly used for converting rowboats and the like into power boats, and my object is to devise a motorwhich will be simple, cheap, and of good appearance. In beaching boatsprovided with outboard motors, it has been necessary for the operator tolift the motor from its driving position before the boat reached thebeach. A further. object therefore is to devise an outboard motor whichwill require no attention when in shallow water. A further object is todevise an out-- board motor having a low center of gravity. Furtherobjects which I have had in mind will hereinafter appear. a

I attain my objects by means of the constructions hereinafter describedand illustrated in the accompanying drawings in which- I Figure 1 isaside elevation of my improved motor, in an inoperative position;

Fig. 2 a plan view of the same; 7

Fig. 3 a cross section through the propellershaft coupling; 7

Fig. 4a side elevation in an operative position;

Fig. 5 a vertical section-through the lock-v ing mechanism; and V V Fig;'6 a vertical section through the spark plug opening in the cylinder.

In the drawings like numerals of reference I indicate correspondingparts in the different 40" figures.

I is a vertical internal combustion'motor connected to a frame 2 in aninverted posi tion, thus bringing the center of gravity as low aspossible. The motor is provided with I a fly wheel 3,-magneto 4,propeller shaft 5,

propeller 6, gasolene tank 7 and cylinder 12. To enable the motor'to beswung in a vertical plane, Iprovide a pivotal connection between theframe 2 and the motor 1- so that the-motor may bemoved rearwardly toimmerse-the propeller and forwardly to raise the propeller clear ofthewater. The framei2'is preferably formed in two halves, each halfbeing provided with adjustable clamps 8 and downwardly extending arms 9Specification of Letters'latent.

OUTBOARD-MOTOR FOR BOATS.

Patented July 5, 1921.

1920. Serial No. 397,423.

to securethe frame to the boat. The extending arms9 are provided withinwardly facing bosses 10 which are spaced apart, by a lug 11 formed onthe motor 1. The two halves of the frame are held together by a bolt 41passing through the bosses 10, this bolt actlng as a pivot for the motor1.

To support the magneto 4, I provide a bracket 13 secured to the forwardcrank shaft bearing. Preferably the bracket 13 is cored so that it willfit over the bearing and a screw with a countersunk head is provided tosecure it in position. A laterally extendmg stud 14 is secured in thisbracket.

The frame 2 is provided with a slot 15 which is arc-shaped, beingconcentric with the center of the bosses 10. The stud 14 extends throughthe slot 15 in the frame 2. A small handwheel 16, provided with aprojeotion 17 adapted to fit an enlargement 18 1n the forward end oftheslot 15, is screwed on the stud 14. It will readily be seen that byscrewing the hand wheel 16 up tight when the motor is swung forwardbringing the stud 14" in alinement with the enlargement 18, that themotor will be locked in a forward position. To release the motor, or tostart the boat after the motor has been started, the hand wheel 16 isunscrewed until the projection 17 is clear of the enlargement 18. Thisallows the motor to swing rearwardly, thus submerging the propeller 6 inthe water. Preferably I form a slot 15 in each half of theframe andsecure two laterally extending studs 14 in the bracket 13.

I find it necessary to have only one hand wheel, so on theother stud Iprovide afriction grip comprising a split washer and a common washerheld by a nut on the outer end of the stud.

The propeller shaft 5 is secured to the crank shaft of the motor 1 bymeans of a coupling 19 provided with a key. A propeller shaft tube 20is-secured by means of a split collar 21 to the rear crank shaft beaning. On the tube 20 is supported.v a rudder sleeve 22, a water pump 23,and a collar 24 which supports tiller ropes 25. The rudder sleeve 22 issecured to the propeller shaft tube 20 by means of set .screws. Thissleeve has a downwardly extending pin 26 on which a rudder 27 pivots.Two laterally extending arms 28 are provided on the rudder to which thetiller ropes are connected. The collar 24 is provided with lugs Ithrough which the tiller ropes pass. Preferably I employ the collar 24for another purpose; to each lug is connected one end of a tensionspring 29, the other endbeing connected toeach tiller rope. The springstend to keep the tiller ropes taut, thus keeping the boat from turningunless a greater pressure be applied to one of the ropes. 7

The cylinder '12 is provided with a water jacket 30, which is preferablyformed with of ordinary construction, pumps water only when submerged soI connect a water pipe 32 from the pump'23 to the upper part of thewater jacket instead of to the lower part as' is usual. By thisarrangement air is not pumped into the water jacket, to cause the waterto overflow when the engine is left running with the suction inlet ofthe pump out of the water. Y Preferably I provide a transverselyarranged lug 31 ontherudder Sleeve 22. The rudder, being inclined on itsforward edge, it tends to lift over anobstruction and the lug 31 engagesthe upper edge of the rudder to resist upward strain if any obstacle isencountered. I

To exclude water from the spark plug, I employ a tube 33 which issecured to the combustion chamber of the cylinder 12; Preferably I makethe combustion chamber L'shaped and secure-a flange 34 thereto.- Theflange 34 is provided with a boss over which the tube 33 is secured tomake a water tight joint." To'prevent water from gaining access to thetop of the tube 33, I extend it up through the gasoline tank 7 makingtight joints at'the top and bottom of the tank.

:To unscrew the spark plug, I employ a box wrench 35 which is made oftubing of smaller diameter than" the tube 33 so it will fitin thelatter. I extend the box wrench 35 above the top of the tube 33 and forma downwardly extending slot 36'at the upper end of the wrench. A cover37 is provided, fitting over the upper end of the box wrench 35,1servingas a handle for swinging the motor to raise or lower the propellershaft. The spark plug is provided with an insulated high tension cablewhich passes up through the wrench 35 and out through the lower end ofthe slot 36 connecting it to the magneto 4. The cable is also used forremoving the spark plug after it'has been unscrewed by the wrench 35. v

To prevent water reaching the cylinder 12 from the exhaust pipe 38, Ibend the latter over the crank case and have its outlet end depending.The end of the depending portion of the exhaust pipe: 38 is plugged andsmall holes, of total area equal to the area of the pipe, are drilled inthe wall of said depending portion the holes being arranged so n-o'waterentering the pipe can pass over the bend and get into the cylinder.

of the crank case of the motor, remote from any ports in'the cylinder12, any gasoline leakage from the former will rundown into the open endof the motor piston and settle on the bottom where it would soon beevaporated. 7

Referring particularly to it will be seen that. the magneto 4 and flywheel 3 are forward of thelpivot 41 on which the motor swings, thusacting as a counterweight to the propeller shaft 5 and the other partsin the rear of the pivot.

It will also be seenthat with my construction should the rudder orpropeller strike ail-obstacle the propeller shaft'will automaticallyraise itself until it passes over the obstacle and then drop to itsformer position. The motor may be frictionally locked in anyintermediate position by tightening the Figs. 1 and 4,"

hand wheel 16- to hold the projection 17 ,1

against the face of the slot 15." Thisarrange- I rnent permits thepropeller'to drive the boat in shallow water where only partialsubmergence is possible- What I claim as my invention'is i Y 1. In anoutboard motor for boats th combination of a frame adapted to bes curedto a boat; an inverted vertical internal combustion motor connected tosaid frame, the cylinder of the motor being lo-' cated below the upperpart of the frame;

and a propeller shaft driven by said motor. 2.- In an outboardmotorcuredto a boat; an inverted vertical internal combustion motor pivotallyconnected to the frame,-thecylinder of the motor being 10- motorswinging in a vertical plane in line" with the propeller shaft. 3. Anoutboard motor for boats the' comblnation of a frame adapted'to'be se'for boats con structed as set forth in claim 2 provided with means tolimitthe downward swing of themotor and the drop ofthepropeller shaft. VV

4. An outboard motor for boats con structed as set forth in claim 2having a pin and slot connection tolimit the downward swing of themotorand the drop'of the propeller shaft, the slot being provided in theframe and concentric with the pivotal connection.

cured to a boat; an inverted vertical internal COIIlbIlStlOIl motorpivotally connected to the frame, the cylinder of the motor beinglopeller shaft driven by said motor, the motor 5. In an outboard motorfor boats the combination of a frame adapted to be seswinging in avertical plane in line with the propeller shaft; a slot provided in saidframe; a pin secured to said motor and extending through said slot; andclamping means provided on said pin whereby the motor may be locked in aforward position thus holding the propellershaft in a raised position.

6. An outboard motor for boats constructed as set forth in claim 5having the forward end of the slot counterbored; and a locking memberprovided on the pin having a projection adapted to fit said counterbore.

7. An outboard motor for boats constructed as set forth in claim 5having the forward end of the slot counterbored; and a hand wheelscrewed on the pin provided with a projection adapted to fit saidcounterbore. r

8. In an outboard motor for boats the combination of a frame comprisingtwo halves each half adapted to be secured to a boat and provided with aboss; an inverted vertical internal combustion motor provided with a lugjournaled between said bosses; and a propeller shaft driven by saidmotor.

9. In an outboard motor for boats, the combination of a frame adaptedto" be secured to a boat; a vertical internal combustion motor providedwith a water jacket having an open top and connected to said frame; apropeller shaft driven by said motor; a tube inclosing said propellershaft; and a water pump secured to said tube and connected to the upperpart of said water jacket.

10. In an outboard motor for boats, the combination of a frame adaptedto be secured to a boat; a vertical internal combustion motor connectedto said frame; a propeller shaft driven by said motor; a tube inclosingsaid propeller shaft; a sleeve secured to said tube; a rudder having itsforward edge inclined and pivoted on said sleeve and provided withlaterally extending arms; a collar secured on said tube; a tiller ropesecured to each of the said arms and supported by said collar; and atransversely arranged lug formed on the bottom of said sleeve adapted tobe engaged by the upper edge of said rudder to resist upper strain ofthe latter.

11. In an outboard motor for boats, the combination of a frame adaptedto be secured to a boat; a vertical internal combustion motor connectedto said frame; a propeller shaft driven by said motor; a tube inclosingsaid propeller shaft; a sleeve secured to said tube; a rudder pivoted onsaid sleeve and provided with laterall extended arms; a collar securedon said tu e; a tiller rope secured to each of the said arms andsupported by said collar; and a spring connected to each tiller rope andconnected to said collar.

Signed at Toronto, Canada, this 8th day of July, 1920.

HARRY W. SPENCER.

